Hi I discovered my dad's old motorbike the other day and I would like to find out a bit more about it. It has Vincent clearly on part of the engine and HRD on the other. I have looked through all the pictures I can find of old Vincent motorbikes but none of them look the same as this one. I am maybe thinking my dad was building a custom bike and just using a Vincent engine maybe. If any body could help me identify any parts on the bike that would be a massive help. Thanks Gary